Hydrodynamic stress and phenotypic plasticity of the zebrafish regenerating fin
DOKPE
- Dagenais, Paule ORCID University of Zurich
- Blanchoud, Simon ORCID University of Fribourg
- Pury, David University of Fribourg
- Pfefferli, Catherine University of Fribourg
- Aegerter-Wilmsen, Tinri ORCID University of Zurich
- Aegerter, Christof M. ORCID University of Zurich
- Jaźwińska, Anna University of Fribourg
- 2021
Published in:
- Journal of Experimental Biology. - The Company of Biologists. - 2021, vol. 224, no. 15, p. 1-14
Insect Science
Molecular Biology
Animal Science and Zoology
Aquatic Science
Physiology
Ecology
Evolution
Behavior and Systematics
English
Understanding how extrinsic factors modulate genetically encoded information to produce a specific phenotype is of prime scientific interest. In particular, the feedback mechanism between abiotic forces and locomotory organs during morphogenesis to achieve efficient movement is a highly relevant example of such modulation. The study of this developmental process can provide unique insights on the transduction of cues at the interface between physics and biology. Here, we take advantage of the natural ability of adult zebrafish to regenerate their amputated fins to assess its morphogenic plasticity upon external modulations. Using a variety of surgical and chemical treatments, we could induce phenotypic responses to the structure of the fin. Through the ablation of specific rays in regenerating caudal fins, we generated artificially narrowed appendages in which the fin cleft depth and the positioning of rays bifurcations were perturbed compared with normal regenerates. To dissect the role of mechanotransduction in this process, we investigated the patterns of hydrodynamic forces acting on the surface of a zebrafish fin during regeneration by using particle tracking velocimetry on a range of biomimetic hydrofoils. This experimental approach enabled us to quantitatively compare hydrodynamic stress distributions over flapping fins of varying sizes and shapes. As a result, viscous shear stress acting on the distal margin of regenerating fins and the resulting internal tension are proposed as suitable signals for guiding the regulation of ray growth dynamics and branching pattern. Our findings suggest that mechanical forces are involved in the fine-tuning of the locomotory organ during fin morphogenesis.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Biologie
- Language
-
- English
- Classification
- Biological sciences
- License
- Rights reserved
- Open access status
- bronze
- Identifiers
-
- DOI 10.1242/jeb.242309
- ISSN 0022-0949
- Persistent URL
- https://folia.unifr.ch/unifr/documents/319565
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